Means for transportation of viscous liquids



ul 15, 1958 K. KORBER 2,8 7

MEANS FOR TRANSPORTATION OF VISCOUS LIQUIDS Filed Aug. 16, 1955 2Sheets-Sheet .1

INVEN TOR.

Jzorne S July 15, 1958 KQRBER 2,843,047

MEANS FOR TRANSPORTATION 0F VISCOUS LIQUIDS Filed Aug. 16, 1955 2Sheets-Sheet 2 INVENTOR. zur! Jfdrfie r United States Patent ()f MEANSFOR TRANSPORTATION OF VISCOUS LIQUIDS Kurt Korber, Hamburg-Bergedorf,Germany, assignor to Kurt Korber & C0., many Application August 16,1955, Serial No. 528,606 Claims priority, application Germany July 31,1954 Claims. (Cl. 103-84) This invention relates to means fortransportation of viscous liquids and particularly to a device fortransportation of glue in the manufacture offilter cigarettes.

In connection with bodies, such as rollers, which are immersed inviscous liquids and caused to rotate therein it is a well known factthat during the rotation in the liquid through the clinging or stickingof the liquid due to the adhesion forces thereof velocity increasesoccur which cause shear stresses that, particularly in liquids of highviscosity such as glue, can assume considerable values.

According to the invention, said fact is utilized for creation of atransportation pressure in a novel devicewhich is readily andinexpensively manufactured and requires a minimum of attendance whilemeeting all the requirements for automatic transportation, such asuniform transportation, control of the quantity transported, maintenanceof the consistency, and disturbance-free start of the transportationfollowing prolonged periods of idleness.

The invention essentially consists of a roller rotating in the liquidcontainer and provided with a groove-shaped recess for the primarytransporting of the liquid, said roller cooperating with an outlet thatextends tangentially in relation to the recess, in such a way thatliquid positively transported in the recess through the adhesion leavesthe outlet under pressure.

Above the outlet, a funnel-shaped constriction member is provided whichhas edges that scrape off the liquid from the periphery of the rollerand otherwise are directed towards the outlet whereby the abovementionedtransportation pressure is further increased. Thus, the device operatesas a pump. In order to permit control of the transported quantity, whenrequired, the cross-section of the passage formed by the funnel-shapedconstriction member and the groove-shaped roller recess is variable bymeans of an adjustment member.

Two embodiments of the invention in association With a machine for themanufacture of filter cigarettes are shown in the drawings, in which:

Fig. 1 shows a section through the transportation device,

Fig. 2 is a plan view of the device of Fig. l, with the cover removed,and

Fig. 3 shows a section through a modified embodiment of the invention.

The glue 2 contained in a receptacle 1 is, according to the invention,moved through the adhesion forces by means of a roller 4 secured to ashaft 3 and rotating in the direction of the arrow. In said roller, atthe middle thereof and concentrical with the same, a grooveshaped recess5 is provided, preferably of rectangular cross-section. Thereby, thesize and shape of said crosssection together with the rotary velocity ofthe roller and the viscosity of the glue determine the obtainedtransportation quantity and the transportation pressure. The majorportion of the transported glue is in the groove- K. G.,Hamburg-Bergedorf, Ger- 2,843,047 Patented July 15, 1958 transportationconduit 11 and is transferred into a glue coating device 12 of knownkind which is only partially" shown.

With some glue types it has been found that they must be stirred ever sooften in order to obtain uniform consistency. For this purpose, theshaft 3 is provided with conveyor means comprising helical blades 13,13a the inclination directions of which are opposite in such a way thata flow towards the middle of the glue receptacle and toward the endsurfaces of the roller 4 occurs from the openings 14, 14a in the housingthrough which the shaft 3 extends from its bearings 15, which aresecured to the outside of the housing with some space in between.

In the cover 16 of the glue receptacle there is a hole 17 into which abolt 18 extends one end 19 of which is finger-shaped in such a way thatit can extend into the rectangular recess 5. An adjustment screw 20 isrotatably mounted and guided in a plate 21 which is fixedly secured tothe cover 16. The threaded end portion 22 of the screw 20 engages athreaded bore 23 in the bolt 18 that is secured against turningmovement. According to the adjustment of the screw 20 the cross-sectionof the passage for the glue is increased or decreased at 24. Hereby, thetransported quantity can be controlled over a wide range.

In the modified embodiment of Fig. 3, the glue roller 4' cooperates witha counter-roller 25. This embodiment has the advantage that the glue isstill more uniformly worked and that crust formation at the glue surfaceis avoided through the continuous crushing between the two rollers. Inthis structure, the provision of helical blades for stirring isunnecessary.

What I claim is:

1. In a device for pressure transportation of viscous liquids, a liquidreceptacle adapted to be partially filled with said liquid, a rotatablymounted roller with its major portion immersed in the liquid in saidreceptacle, a circumferential groove-shaped recess in said roller,outlet means providing a discharge passage in said receptacle andarranged tangentially to said groove-shaped recess in said roller toreceive liquid transported by said roller due to adhesion, and afunnel-shaped constriction member forming an inlet mounted in saidreceptacle and disposed above'said outlet means, said constrictionmember having roller engaging scraper edges adapted to scrape the liquidfrom the circumference of the roller and direct the same towards saidrecess.

2. In a device for pressure transportation of viscous liquids, a liquidreceptacle adapted to be partially filled with said liquid, a rotatablymounted roller with its major portion immersed in the liquid in saidreceptacle, a circumferential groove-shaped recess in said roller,outlet means providing 'a discharge passage in said receptacle andarranged tangentially to said groove-shaped recess in said roller toreceive liquid transported by said roller due to adhesion, afunnel-shaped constriction mem ber forming an inlet mounted in saidreceptacle and disposed above said outlet means, said constrictionmember having roller engaging scraper edges for scraping the liquid fromthe circumference of the roller and direct the liquid towards saidgroove-shaped recess, a fingerin a.

3 shaped member supported in said receptacle with one end disposed inthe discharge passage of said outlet mea ns formed by said funnel-shapedconstriction member and said groove-shaped recess, and means foradjusting the position of said finger-shaped member whereby to regulatethe cross-sectional area of said discharge passage.

3. In a device for pressure transportation of viscous liquids, a liquidreceptacle adapted to be partially filled with said liquid, a rotatablymounted roller with its major portion immersed in the liquid in saidreceptacle, a circumferential groove-shaped recess in said roller,outlet means providing a discharge passage in said receptacle andarranged tangentially to said groove-shaped recess in said roller toreceive liquid transported by said roller due to adhesion, and conveyormeans disposed in said receptacle at both sides of said roller androtatable therewith to move the liquid towards the middle of saidreceptacle and toward the end surfaces of said roller.

4. In a device for pressure transportation of viscous liquids, a liquidreceptacle adapted to be partially filled with said liquid, a rotatablymounted roller with its major portion immersed in the liquid in saidreceptacle, a circumferential groove-shaped recess in said roller,outlet means providing a discharge passage in said receptacle tangentialto said groove-shaped recess in said roller to receive liquidtransported by said roller due to adhesion, a funnel-shaped constrictionmember forming an inlet mounted in said receptacle and disposed abovesaid outlet means, a lip formed on said receptacle at said outlet meansand extending into said groove-shapedrecess below constriction member,said constriction member having rgllsr e a n Saar?! ed for p n th q ifrom the upper portion of the circumference of the roller and direct theliquid into said recess.

5. In a device for pressure transportation of .viscous liquids, a liquidreceptacle adapted to be partially filled with said liquid, a rotatablymounted roller with its major portion immersed in the liquid in saidreceptacle, a circumferential groove-shaped recess in said roller, 2counter-roller rotatably mounted in said receptacle parallel to andadjacent said first mentioned roller and also immersed in said viscousliquid in said receptacle, said counter-roller being arranged so closewith its periphery to the periphery of said first mentioned roller so asto form a narrow gap between said two rollers, outlet means providing adischarge passage in said receptacle arranged to extend with its liquidreceiving end from below into the gap between said two rollers, and afunnel-shaped constriction member forming an inlet for said outlet meansmounted in said receptacle and extending from above into the gap betweensaid two rollers, said constriction member having edges engaging saidfirst mentioned roller to scrape the liquid adhering to thecircumference of said first mentioned roller from said circumference anddirecting it toward said groove-shaped reces s in said roller.

References Cited in the file of this patent UNITED STATES PATENTS

